Uninterruptible power supply



FIG. 1 is a front view of an uninterruptible power supply showing our new design;

FIG. 2 is a back view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is an opposite side view thereof, of that shown in FIG. 3;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a front view of another embodiment of an uninterruptible power supply showing or new design with all other views disclaimed.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an uninterruptible power supply, as shown and described. 